<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>上拉加载</title>
    <meta name="viewport" content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no"/>

    <script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script>
    <style type="text/css">
        * {
            margin: 0;
            padding: 0;
            list-style: none;
            box-sizing: border-box;
            -webkit-box-sizing: border-box;
            -moz-box-sizing: border-box;
        }
        html { font-size: 14px; }
        img {max-width: 100%;}
        header {
            height: 40px;
            width: 100%;
            min-width: 320px;
            background: #98b1d7;
            text-align: center;
            color: #fff;
            font-size: 1.2rem;
            line-height: 40px;
        }
        footer {
            height: 52px;
            width: 100%;
            min-width: 320px;
            background: #98b1d7;
            text-align: center;
            color: #fff;
            font-size: 1.2rem;
            line-height: 52px;
            position: absolute;
            bottom: 0;
        }
        #wrapper {
            min-width: 320px;
            position: absolute;
            left: 0;
            top: 40px;
            bottom: 52px;
            width: 100%;
            overflow: hidden;
            z-index: 1;
            background-color: #eee;

            /* 防止本机Windows上的触摸事件 */
            -ms-touch-action: none;

            /* 防止callout tap-hold和文本的选择 */
            -webkit-touch-callout: none;
            -webkit-user-select: none;
            -moz-user-select: none;
            -ms-user-select: none;
            user-select: none;

            /* 防止文本调整取向变化对web应用程序很有用 */
            -webkit-text-size-adjust: none;
            -moz-text-size-adjust: none;
            -ms-text-size-adjust: none;
            -o-text-size-adjust: none;
            text-size-adjust: none;
        }
        .pull-loading {
            text-align: center;
            height: 40px;
            line-height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        #scroller ul li {
            padding: 20px 10px;
            border-bottom: solid 1px #ccc;
            background: #fff;
        }
    </style>

</head>
<body>
<header>上拉加载，下拉刷新</header>
<div id="wrapper">
    <div id="scroller">
        <ul>
            <li>程序猿、源代码、码农、码匠</li>
            <li>程序猿、源代码、码农、码匠</li>
            <li>程序猿、源代码、码农、码匠</li>
            <li>程序猿、源代码、码农、码匠</li>
            <li>程序猿、源代码、码农、码匠</li>
            <li>程序猿、源代码、码农、码匠</li>
            <li>程序猿、源代码、码农、码匠</li>
            <li>程序猿、源代码、码农、码匠</li>
            <li>程序猿、源代码、码农、码匠</li>
            <li>程序猿、源代码、码农、码匠</li>
        </ul>
        <div class="pull-loading">
            上拉加载
        </div>
    </div>
</div>
<footer>底部</footer>

<script type="text/javascript" src="js/iscroll.js"></script>
<script type="text/javascript">
    var myscroll = new iScroll("wrapper", {
        onScrollMove: function () { //拉动时
            console.log('y: ', this.y)
                console.log('scrollY: ', this.maxScrollY)
            //上拉加载
            if (this.y < this.maxScrollY) {
                
                $(".pull-loading").html("释放加载");
                $(".pull-loading").addClass("loading");
            } else {
                $(".pull-loading").html("上拉加载");
                $(".pull-loading").removeClass("loading");
            }
        },
        onScrollEnd: function () { //拉动结束时
            //上拉加载
            if ($(".pull-loading").hasClass('loading')) {
                $(".pull-loading").html("加载中...");
                pullOnLoad();
            }
        }
//        onRefresh: function () {
//            $('.pull-loading').html("上拉加载");
//        }
    });
    //上拉加载函数,ajax
    var num = 0;
    var page = 4; //每次加载4条
    function pullOnLoad() {
        setTimeout(function () {
            /*$.ajax({
                url: "json/data.json",
                type: "get",
                dataType: 'json',
                success: function (data) {
                    var data_length = data.length;//数据的总长度
                    var remainder = data_length % page;//余数
                    if ( data_length >= (num+page)){
                        for (var j = num; j < num + page; j++){
                            var text = data[j].text;
                            $("#scroller ul").append("<li>"+ text +"</li>");
                        }
                        num+=page;
                    }else if (remainder != 0 && data_length-num == remainder){
                        for (var j = num; j < num + remainder; j++){
                            var text = data[j].text;
                            $("#scroller ul").append("<li>"+ text +"</li>");
                        }
                        num+=page;
                    }else{
                        $('.pull-loading').html("没有了哟");
                    }
                    myscroll.refresh();
                },
                error: function () {
                    console.log("出错了");
                }
            });*/

            for (var j = 0; j < 4; j++){
                $("#scroller ul").append("<li>老夫聊发少年狂，不小心，选错行。误入IT，两眼泪茫茫</li>");
            }
            myscroll.refresh();

        }, 1000);
    }
</script>

</body>
</html>